pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3670-Bourree_27.ps) >>/Users/jc/w/tmp/Tune-3670-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/bourree/Bourree_27.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_36703.log 454335 Log file, useful mostly for debugging
Coll_36707.log 613100 Log file, useful mostly for debugging
Coll_36708.log 616429 Log file, useful mostly for debugging
Tune-3670-Bourree_27.abc 343 ABC music file with the extracted tune(s)
Tune-3670-Bourree_27.ps 33803 PostScript
Tune-3670-Bourree_27.txt 343 Plain-text file with the extracted tune(s)
Tune-3670-get.log 4377 Log file, useful mostly for debugging
Tune-36700-get.log 4573 Log file, useful mostly for debugging
Tune-36701-get.log 3386 Log file, useful mostly for debugging
Tune-36702-get.log 3146 Log file, useful mostly for debugging
Tune-36704-get.log 4258 Log file, useful mostly for debugging
These files should be available for 24 hours.